Proving Hours Your Employer Didn't Record

Most people assume the arithmetic is settled before they start. The employer has the timeclock, the payroll system and the records. You have a feeling that you worked more than you were paid for. In that framing, arguing about it looks like your word against a database, and the database wins.

Federal wage law doesn’t set it up that way, and the difference is worth understanding before you decide the situation is hopeless.

The record-keeping duty sits with the employer

Employers covered by the Fair Labor Standards Act are required to keep accurate records of hours worked and wages paid. That’s not a courtesy or a best practice — it’s an obligation that belongs to them, and the practical consequence is significant. Courts have held for decades that where an employer’s records are inaccurate or inadequate, an employee can carry their burden by producing enough evidence to show the amount of uncompensated work as a matter of just and reasonable inference. At that point it falls to the employer to come forward with evidence of the precise hours or to rebut the inference.

Put plainly: sloppy or dishonest record-keeping doesn’t work in the employer’s favour. It shifts weight onto them. A worker’s own account isn’t a weak substitute for the real records in that situation — under the right conditions it’s the evidence the case runs on.

The phrase doing the work there is enough evidence. Which brings us to what your log actually has to look like.

Round numbers are the problem

The single thing that most weakens a personal record is that it reads as reconstructed. A page that says “about ten hours a week extra, for about a year” is a conclusion, not evidence, and it’s the kind of statement anyone can produce after the fact about anything.

What reads differently is specificity that nobody would bother inventing. Twenty-five minutes on a Tuesday. Forty on the Thursday after. A note that the shift lead asked you to set up the floor before clocking in, with the shift lead’s name. A lunch break the system deducted while you were covering the phones, on a day you can name. Detail at that resolution is expensive to fabricate and cheap to keep if you write it down the same day, which is exactly why it carries.

The second thing that weakens a record is that it only contains the bad days. If your log shows unpaid time every single shift for two years without exception, it invites the obvious question. Real work patterns have exceptions in them. Record the ordinary weeks too — they’re what makes the rest believable.

The four categories people forget to count

Before and after the clock. Setup, closing, changing into required gear, waiting for a system to boot, carrying takings to the bank. It rarely feels like “work” because it’s five minutes, and five minutes across 250 shifts is more than 20 hours.

Breaks that weren’t breaks. This is the one that produces the largest numbers and the least attention, because an automatic deduction happens invisibly. If a thirty- or sixty-minute unpaid break was deducted on a day you ate at your desk while answering calls, that is a gap between hours worked and hours recorded, and it repeats every single shift.

Work at home. Messages, calls, scheduling, admin, answering a customer at 9pm. It doesn’t announce itself as a shift, and it’s often the only thing with a timestamp attached — check whether your own phone or email quietly documented it for you.

Travel and cover between sites. Moving between locations during the working day, covering another branch, being called in and sent home again.

The weekly boundary matters more than the daily one

Under the FLSA, nonexempt workers must be paid at least one and a half times their regular rate for hours worked beyond 40 in a workweek. That’s a weekly threshold, not a daily one — which means half an hour extra on each of five days can cross it even though no single day looked unusual, and it’s the reason unrecorded minutes matter out of proportion to their size.

Two caveats worth knowing. Some states go further than the federal floor, adding daily overtime or other protections, so the federal calculation is a minimum rather than the whole picture. And some roles are exempt from overtime entirely — worth checking against your actual duties rather than your job title, since the title is not what decides it.

If you’re in the UK, almost none of the above applies

Worth saying plainly, because the internet on this subject is overwhelmingly American and the rules genuinely differ.

There is no statutory right to extra pay for overtime in the UK. None. If your contract promises time-and-a-half, you’re owed time-and-a-half because the contract says so; if it says nothing, extra hours are owed at your normal rate. Chasing a premium that was never promised is a dead end.

What UK law does require is that your average pay doesn’t fall below the National Minimum Wage or National Living Wage for your age band — from 1 April 2026, £12.71 for 21 and over, £10.85 for 18 to 20, and £8.00 for under-18s and eligible apprentices. That is where unpaid hours become a legal problem rather than an unfairness, and the mechanism is quietly brutal: your contractual rate never changes, but the hours it’s effectively divided into keep growing. Someone on exactly the minimum wage who works twenty unrecorded minutes a day is, arithmetically, being paid below it. Underpayment can be reported to HMRC confidentially, and Acas gives free advice.

The other difference is speed. Unpaid wages are usually pursued as an unlawful deduction from wages, and the tribunal time limit is broadly three months less one day from the last deduction, with Acas early conciliation started inside that window. Compared to the American two-to-three years, that is almost no time at all — which makes writing things down as they happen less of a good habit and more of a requirement.

There is a clock, and it’s already running

In the US, the FLSA generally allows two years to recover back wages, extended to three where a violation was willful. That has an unglamorous implication: the oldest week in your log is quietly aging out of range while you decide whether the whole thing is worth pursuing. Every month of hesitation costs the far end of the record.

It also means today is the cheapest day this will ever be to start. Reconstructing eighteen months from memory produces exactly the round numbers that don’t help. Writing down this week takes two minutes and is worth more.

Neither the Department of Labor’s Wage and Hour Division nor your state labour agency requires a lawyer to take a complaint, and most employment lawyers assess wage cases without charging for the first look. What all of them will ask for first is your record.

If it’s useful to have the structure already built, the Unpaid Hours & Wage Theft Log records each day’s actual times against what your employer recorded and prints a dated summary. It has a US mode that applies the federal 40-hour overtime standard, and a UK mode that values hours at your contract terms and checks your effective rate against the current minimum wage. It’s free, there’s no account, and everything stays in your own browser.

This is general information about record-keeping, not legal advice. Whether you’re owed anything depends on facts specific to your job and your state.